Size Chart:

US6: Ball Girth: 8.3", Foot Length: 9.0", Heel Height: 0.5"

US6.5: Ball Girth: 8.5", Foot Length: 9.3", Heel Height: 0.5"

US7: Ball Girth: 8.6", Foot Length: 9.5", Heel Height: 0.5"

US8: Ball Girth: 8.8", Foot Length: 9.8", Heel Height: 0.5"

US9: Ball Girth: 9.0", Foot Length: 10.0", Heel Height: 0.5"

US9.5: Ball Girth: 9.2", Foot Length: 10.3", Heel Height: 0.5"

US10.5: Ball Girth: 9.4", Foot Length: 10.6", Heel Height: 0.5"

US11: Ball Girth: 9.5", Foot Length: 10.8", Heel Height: 0.5"

This data was obtained from manually measuring the product, it may be off by 1-2 CM